Truck cab portion



FIG. 1 is a perspective view of the truck cab portion embodying the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

FIGS. 1-7 show features in broken lines. These features do not form any part of the claimed design. The broken lines immediately adjacent the sold-line portions of the design form the boundary of the design, with the broken lines forming no part of the claimed design. 

CLAIM The ornamental design for a truck cab portion, as shown and described. 